Sun is over the yardarm

: I am try to find out the
meaning of
: "Is the sun over the yard arm"

SUN IS OVER THE YARDARM - "(time
for happy hour to begin). This expression is thought to have its origins in an
officers' custom aboard ships sailing in the north Atlantic. In those latitudes,
the sun would rise above the upper yards - the horizontal spars mounted on the
masts, from which squaresails were hung - around 11 a.m. Since this coincided
with the forenoon 'stand easy,' officers would take advantage of the break to
go below for their first tot of spirits for the day. The expression washed ashore
where the sun appears over the figurative yardarm a bit later in the day, generally
after 5 p.m., and the end of the workday." From "When a Loose Cannon Flogs a Dead
Horse There's the Devil to Pay: Seafaring Words in Everyday Speech" by Olivia
A. Isil (International Marine/Ragged Mountain Press, McGraw-Hill, 1996)